Affordable Access

Publisher Website

The impact of recycling and repeated recycling on shear bond strength of stainless steel orthodontic brackets

Orthodontic Waves
DOI: 10.1016/j.odw.2012.10.001
  • Recycled Bracket
  • Sbs
  • Sandblasting
  • Stainless Steel Orthodontic Bracket


Abstract Purpose To compare Shear Bond Strength (SBS) of new, recycled and repeated recycled stainless steel orthodontic brackets with and without bracket base primer. Materials and methods 120 extracted human premolar teeth and 120 premolar stainless steel orthodontic brackets were divided into six groups for 20 teeth each. Orthodontic brackets of four groups were sandblasted with 50μm aluminum oxide powder and half of them were recycled for second time. Light cure orthodontic adhesive primer was applied for half of total brackets. Light cure composite was applied for all brackets and polymerization was carried out. Groups 1–6 were subjected to a shear force within half hour to simulate as done clinically with a universal testing machine (Shimadzu Trapezium X) until the bracket debond. Results The results of this study demonstrated that the mean SBS of all groups were more than that recommended by Reynolds in 1975, there was no significant difference between new and recycled brackets. Only one group (repeated recycled without bond) has significantly lower SBS. Conclusion It can be concluded that: sandblasted recycled orthodontic brackets can be used as an alternative to new brackets which might provide cost reduction and in case of using repeated recycled brackets, better to apply bonding agent on bracket base for more bond strength.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Effects of recycling and bonding agent application...

on Journal of clinical and experi... Oct 01, 2013

Recycling stainless steel orthodontic brackets wit...

on Journal of orthodontic science July 2013

The effects of recycling on the tensile bond stren...

on British journal of orthodontic... May 1990

Shear bond strength of stainless steel orthodontic...

on American Journal of Orthodonti... March 2001
More articles like this..